1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
|
<?php
/*
+-----------------------------------------------------------------------+
| program/include/session.inc |
| |
| This file is part of the RoundCube Webmail client |
| Copyright (C) 2005, RoundCube Dev, - Switzerland |
| Licensed under the GNU GPL |
| |
| PURPOSE: |
| Provide database supported session management |
| |
+-----------------------------------------------------------------------+
| Author: Thomas Bruederli <roundcube@gmail.com> |
+-----------------------------------------------------------------------+
$Id$
*/
function sess_open($save_path, $session_name)
{
return TRUE;
}
function sess_close()
{
return TRUE;
}
// read session data
function sess_read($key)
{
global $DB, $SESS_CHANGED;
$sql_result = $DB->query(sprintf("SELECT vars, ip, UNIX_TIMESTAMP(changed) AS changed
FROM %s
WHERE sess_id='%s'",
get_table_name('session'),
$key));
if ($sql_arr = $DB->fetch_assoc($sql_result))
{
$SESS_CHANGED = $sql_arr['changed'];
if (strlen($sql_arr['vars']))
return $sql_arr['vars'];
}
return FALSE;
}
// save session data
function sess_write($key, $vars)
{
global $DB;
$sql_result = $DB->query(sprintf("SELECT 1
FROM %s
WHERE sess_id='%s'",
get_table_name('session'),
$key));
if ($DB->num_rows($sql_result))
{
session_decode($vars);
$DB->query(sprintf("UPDATE %s
SET vars='%s',
changed=NOW()
WHERE sess_id='%s'",
get_table_name('session'),
$vars,
$key));
}
else
{
$DB->query(sprintf("INSERT INTO %s
(sess_id, vars, ip, created, changed)
VALUES ('%s', '%s', '%s', NOW(), NOW())",
get_table_name('session'),
$key,
$vars,
$_SERVER['REMOTE_ADDR']));
}
return TRUE;
}
// handler for session_destroy()
function sess_destroy($key)
{
global $DB;
$DB->query(sprintf("DELETE FROM %s
WHERE sess_id='%s'",
get_table_name('session'),
$key));
// also delete session entries in cache table
$DB->query(sprintf("DELETE FROM %s
WHERE session_id='%s'",
get_table_name('cache'),
$key));
return TRUE;
}
// garbage collecting function
function sess_gc($maxlifetime)
{
global $DB;
// get all expired sessions
$sql_result = $DB->query(sprintf("SELECT sess_id
FROM %s
WHERE UNIX_TIMESTAMP(NOW())-UNIX_TIMESTAMP(created) > %d",
get_table_name('session'),
$maxlifetime));
$a_exp_sessions = array();
while ($sql_arr = $DB->fetch_assoc($sql_result))
$a_exp_sessions[] = $sql_arr['sess_id'];
if (sizeof($a_exp_sessions))
{
// delete session records
$DB->query(sprintf("DELETE FROM %s
WHERE sess_id IN ('%s')",
get_table_name('session'),
join("','", $a_exp_sessions)));
// also delete session cache records
$DB->query(sprintf("DELETE FROM %s
WHERE session_id IN ('%s')",
get_table_name('cache'),
join("','", $a_exp_sessions)));
}
return TRUE;
}
// set custom functions for PHP session management
session_set_save_handler('sess_open', 'sess_close', 'sess_read', 'sess_write', 'sess_destroy', 'sess_gc');
?>
|
